TS 270 

U6 
Copy 1 



No. 460 



SPECIAL SPECIFICATIONS 

FOR 

STEEL WIRE 



TO BE USED IN CONNECTION WITH 
ORDNANCE PAMPHLET No. 445 




JANUARY, 14, 1904 
REVISED APRIL 9, 1907 
REVISED JULY 30, 1908 
REVISED JUNE 23, 1909 
REVISED JANUARY 26. 1910 
REVISED JULY 30, 1914 



WASHINGTON 

GOVERNMENT PRINTING OFFICE 

1914 



No. 460 



SPECIAL SPECIFICATIONS 



FOR 



STEEL WIRE 



TO BE USED IN CONNECTION WITH 
ORDNANCE PAMPHLET No. 445 




JANUARY, 14, 1904 
REVISED APRIL 9, 1907 
REVISED JULY 30, 1908 
REVISED JUNE 23, 1909 
REVISED JANUARY 26, 1910 
REVISED JULY 30, 1914 



WASHINGTON 

GOVERNMENT PRINTING OFFICE 

1914 



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PART I. 

INSTRUCTIONS TO BIDDERS AND GENERAL 
SPECIFICATIONS FOR THE MANUFACTURE OF 
MATERIAL FOR CANNON CONTAINED IN ORD- 
NANCE PAMPHLET NO. 445, FORM A PART OF 
ANY CONTRACT FOR STEEL WIRE. 

58565—14 (3) 



PART II. 
SPECIFICATIOK-S FOR STEEL WIRE. 

1. The wire must be of square cross section, one- 
eighth inch or one-tenth inch on a side, as may be called 
for in the proposals. It must be delivered neatly and 
snugly wound on wooden spools of sufficient strength 
to stand shipment and use while the wire is being un- 
wound. The winding shall be in neat concentric layers, 
in such manner as to avoid aU tortional or other serious 
strains, and the United States reserves the right to 
reject, in the course of manufacture of the cannon for 
which this wire is to be used, any and all spools of wire 
in which the strains are serious enough to render it ob- 
jectionable. The spools shall have a hole through the 
center of at least 2J inches in diameter for mounting it 
on an arbor for unwinding the wire, and the spool upon 
which the wire is laid shall not be less than 15 inches in 
diameter. 

2. The net weight of wire on each spool shaU be 185 
pounds, plus or minus 10 per cent for 75 per cent of the 
amount called for in any contract; 15 of the remaining 
25 per cent shall have a weight of 150 pounds minimum 
per spool, and the last 10 per cent a weight of not less 
than 100 pounds per spool. The wire on aU spools shall 
be without splice or break, except where a test specimen 
has been taken from other than the ends, in which case 
the spool will be so marked as to show that the wire is 
broken. 

3. All the wire must be rounded at the corners with a 
radius of 0.01 inch. It must be smooth and of accurate 

(5) 



6 

sectional dimensions and free from checks, twists, flaws, 
or other defects. A variation not exceeding 0.004 inch 
above the specified size will be allowed in the sectional 
dimensions . A variation of .00 1 inch b elo w the specified 
size will be allowed in the sectional dimensions, pro- 
vided that the total amount of wire having a minimum 
cross section does not exceed 10 per cent of the amount 
of wire to be delivered. 

4. The following physical qualities are required, viz: 
(a) All wire must have sufficient ductility to enable it 
to be wrapped without rupture about a cylinder of di- 
ameter equal to the diagonal of its cross section. 

(h) The wire one-eighth inch on a side must have an 
ultimate strength of at least 180,000 pounds per square 
inch. The elongation due to an increase in stress from 
20,000 to 100,000 pounds per square inch must not ex- 
ceed 0.35 of 1 per cent of the original gauge length. 

(c) The wire one-tenth inch on a side must have an 
ultimate strength of at least 200,000 pounds per square 
inch. The elongation due to an increase in stress from 
20,000 to 140,000 pounds per square inch must not 
exceed 0.50 of 1 per cent of the original gauge length. 

(d) The right is reserved to reject wire which may 
have very high qualities with lack of uniformity, 
which is too hard and stiff to pass through the winding 
machines and wind satisfactorily on the gun, which 
breaks in winding, or for other reasons is unsuitable for 
use in gun manufacture. 

5. (a) When wire is rejected after delivery, the con- 
tractor will be allowed the following times of delivery for 
the replacing wire : 

Days. 

25,000 pounds or less 30 

From 25,000 to 50,000 pounds 45 

From 50,000 to 100,000 pounds 60 

More than 100,000 pounds 90 



(b) The time allowance shall date from the date of 
receipt by the contractor of the notification of rejection. 

(c) If the replacing wire be not delivered within the 
time specified, liquidated damages shall accrue at the rate 
specified in the contract. 

6. All necessary precautions will be taken by the manu- 
facturer to prevent wire from rusting before delivery and 
during shipment. 

7. In order that preparation for splicing may be made 
prior to unwinding the wire from a spool, the inner end 
of the wire will be left free and exposed for at least 2 feet 
of its length, and the inner and outer ends as wound on 
the spool will be clearly indicated. The outer end will 
not be passed under any of the wire of the spool, but will 
be free, so that when spliced to the wire of the preceding 
spool the entire wire on the spool may be unwound freely 
without being tangled or twisted. All spools not so 
wound will be rejected during manufacture. 

8. As an electrically welded joint is desirable a wire 
giving a high percentage of strength, using this method, 
is preferred. 

9. The manufacture of the wire, to such extent at 
least as may be necessary to verify the requirements of 
these specifications, must be open to inspection by the 
inspector appointed by the Ordnance Department. The 
finished wire will be inspected at the place of manufac- 
ture aad after acceptance must be delivered with the 
coils properly packed and covered free on board cars for 
transportation by the most convenient shipping line to 
the point designated by the United States, or must be 
delivered at such points as may be specified in the con- 
tract. The manufacturer must afford full facilities for 
the inspection and supply such assistance as the inspector 
may require therefor. Test pieces will be taken from 
each end of each coil, and the inspector may select other 



test pieces from such parts of the* coil as he may desig- 
nate; but when specimens are taken from other than the 
ends the whole coils shall be accepted, provided it comes 
up to the specifications. All specimens on being detached 
from the wire must pass through the inspector's hands for 
inspection and record. If the manufacturer possesses a 
reliable testing machine, judged by comparison with 
results with the United States testing machine at Water- 
town Arsenal, he shall without expense to the United 
States test thereon such specimens as the inspector may 
designate. Such tests shall be made in the manner pre- 
scribed by the United States and in the presence of the 
inspector. All other specimens required for the inspec- 
tion of the wire shall be delivered to the inspector at the 
place of manufacture without expense to the United 
States, for test by the United States at Watertown 
Arsenal, Mass. 

William Ckozier, 
Brigadier General, Chief of Ordnance, 

War Department, 

Office of the Chief of Ordnance, 
Washington, July 30, 1914. 

January 14, 1904. 
Revised April 9, 1907. 
Revised July 30, 1908. 
Revised June 23, 1909. 
Revised January 26, 1910. 
Revised July 30, 1914. 
32688-fi222-l. 
Form No, 460. 
Ed. Aug. 22-14—500. 



LIBRARY OF CONGRESS 




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